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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { Tapable, HookMap, SyncHook, SyncWaterfallHook } = require("tapable");
const Factory = require("enhanced-resolve").ResolverFactory;
module.exports = class ResolverFactory extends Tapable {
constructor() {
super();
this.hooks = {
resolveOptions: new HookMap(
() => new SyncWaterfallHook(["resolveOptions"])
),
resolver: new HookMap(() => new SyncHook(["resolver", "resolveOptions"]))
};
this._pluginCompat.tap("ResolverFactory", options => {
let match;
match = /^resolve-options (.+)$/.exec(options.name);
if (match) {
this.hooks.resolveOptions.tap(
match[1],
options.fn.name || "unnamed compat plugin",
options.fn
);
return true;
}
match = /^resolver (.+)$/.exec(options.name);
if (match) {
this.hooks.resolver.tap(
match[1],
options.fn.name || "unnamed compat plugin",
options.fn
);
return true;
}
});
this.cache1 = new WeakMap();
this.cache2 = new Map();
}
get(type, resolveOptions) {
const cachedResolver = this.cache1.get(resolveOptions);
if (cachedResolver) return cachedResolver();
const ident = `${type}|${JSON.stringify(resolveOptions)}`;
const resolver = this.cache2.get(ident);
if (resolver) return resolver;
const newResolver = this._create(type, resolveOptions);
this.cache2.set(ident, newResolver);
return newResolver;
}
_create(type, resolveOptions) {
resolveOptions = this.hooks.resolveOptions.for(type).call(resolveOptions);
const resolver = Factory.createResolver(resolveOptions);
if (!resolver) {
throw new Error("No resolver created");
}
this.hooks.resolver.for(type).call(resolver, resolveOptions);
return resolver;
}
};
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